Hi, I wonder if anybody has experienced such a thing with these sensors. Recently I installed a proximity sensor for bed leveling - those PNP NPN ones from eBay. I configured it, it was working great, but after a few days I had to reconfigure its distance because it started to trigger from a shorter distance. I thought it was a bug in me so I moved on. But after a few days that happened again - and now it triggers from such a short distance my hotend touches the bed before the sensor activates. I wonder if it's worth bothering anymore with this... Is this a standard thing that happens with these sensors or it's just that I bought a buggy one? have you experienced such a thing? https://reprap.org/forum/read.php?14,766156,766156#msg-766156 Wed, 17 Jun 2026 02:59:48 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?14,766156,766174#msg-766174 https://reprap.org/forum/read.php?14,766156,766174#msg-766174 ltomov Mechanics Fri, 05 May 2017 15:28:58 -0400 https://reprap.org/forum/read.php?14,766156,766171#msg-766171 https://reprap.org/forum/read.php?14,766156,766171#msg-766171 dc42 Mechanics Fri, 05 May 2017 15:23:32 -0400 https://reprap.org/forum/read.php?14,766156,766156#msg-766156 https://reprap.org/forum/read.php?14,766156,766156#msg-766156 Recently I installed a proximity sensor for bed leveling - those PNP NPN ones from eBay. I configured it, it was working great, but after a few days I had to reconfigure its distance because it started to trigger from a shorter distance.
I thought it was a bug in me so I moved on.

But after a few days that happened again - and now it triggers from such a short distance my hotend touches the bed before the sensor activates.
I wonder if it's worth bothering anymore with this... Is this a standard thing that happens with these sensors or it's just that I bought a buggy one?

have you experienced such a thing?]]> ltomov Mechanics Fri, 05 May 2017 14:31:32 -0400